init commit

symbol/symbol.go

@@ -0,0 +1,36 @@
+package symbol
+
+var intern_map map[string]*Symbol
+
+type Symbol struct {
+	ns     string
+	symbol string
+}
+
+func Intern(ns string, symbol string) *Symbol {
+	combined_str := ns + "/" + symbol
+	existingSymbol, ok := intern_map[combined_str]
+	if ok {
+		return existingSymbol
+	} else {
+		newSymbol := new(Symbol)
+		newSymbol.ns = ns
+		newSymbol.symbol = symbol
+		if intern_map == nil {
+			intern_map = make(map[string]*Symbol)
+		}
+		intern_map[combined_str] = newSymbol
+		return newSymbol
+	}
+}
+
+func String(this *Symbol) string {
+	if this.ns == "" {
+		return this.symbol
+	}
+	return this.ns + "/" + this.symbol
+}
+
+func (this *Symbol) String() string {
+	return String(this)
+}